Calibration; Verification; Values); Intensity / Spot Ratio - Zeiss humphrey HFA II-i series Field Service Manual

Humphrey Field Analyzer II - i
4.8

Calibration

The Calibration main menu is the principle, or main menu for performing instrument
verification and calibration. The menu consists of the following selections:
Verification — Used to verify the Before and After light intensity calibration.
Mechanical — Used to calibrate the projection and turret assemblies.
Intensity — Used to calibrate the spot and bowl intensities.
Print Cal Values — Used to print out the EEPROM settings and wedge values.
Miscellaneous — Used only by Manufacturing.
Camera — Used to calibrate the CCD camera and gaze illuminators.
Save — Used to save the calibration data to the floppy calibration diskette.
Restore — Used to restore the calibration data from the floppy calibration diskette to
the hard drive.
4.8.1

Verification

Calibration Values)
4.8.1.1

Intensity / Spot Ratio

Purpose
The purpose of this procedure is to determine the current state of the instrument light
intensity calibration, both before and after servicing the instrument. The before and after
information is compared to determine if the instrument has had any significant light intensity
calibration shift during service.
Special Tools/Equipment Required
Soligor Light Meter Kit
P
Digital Multimeter, Fluke 8060A or equivalent
P
Bowl Shroud
P
Small Flashlight
P
Prerequisites
All white intensity related calibrations must be performed with dim room light. The
P
dimmer the instrument light, the darker the room must be. Because of the very low
blue light levels, blue-yellow calibration requires total darkness. (Use a small flashlight
occasionally to read meters, etc.)
Procedure
NOTES:
1. You will print out all values obtained during this procedure. All values are
automatically recorded on the HFA II - i Light Intensisty Verification Data printouts
(Before service or After service, as appropriate).
52235C1105
(Obtaining Before and After Light Intensity
Confidential and Proprietary
4 - 7
Adjustment / Calibration
Field Service Guide